August 6, - August 8, 2019

Thanks to Block Scientific, I was able to procure the re-certified Bayer DCA 2000+ without hassles and get the lab back in operation. The
device works perfectly and I look forward to doing more business with Block Scientific.

Helicobacter Pylori IgA ELISA, 96 wells

Introduction
The DRG Helicobacter pylori IgA (Recombinant) Enzyme Immunoassay Kit provides materials for determination of
IgA-class antibodies to Helicobacter pylori in serum. This kit is intended for Research Use Only. Not for use in diagnostic procedures.
Principle Of The Test

Microtiter wells as a solid phase are coated with recombinant Helicobacter pylori (CagA) antigen. Diluted specimens and ready-for-use controls are pipetted into these wells. During incubation Helicobacter pylori-specific antibodies of positive specimens and controls are bound to the immobilized antigens.

After a washing step to remove unbound sample and control material horseradish peroxidase conjugated anti-human IgA antibodies are dispensed into the wells. During a second incubation this anti-IgA conjugate binds specifically to IgA antibodies resulting in the formation of enzyme-linked immune complexes.

After a second washing step to remove unbound conjugate the immune complexes formed (in case of positive results) are detected by incubation with TMB substrate and development of a blue color. The blue color turns into yellow by stopping the enzymatic indicator reaction with sulfuric acid.

The intensity of this color is directly proportional to the amount of Helicobacter pylori-specific IgA antibody in the specimen. Absorbance at 450 nm is read using an ELISA microtiter plate reader.